Dear All, I searched the forums for the answer but I couldn't find it anywhere. So hopefully I'm not the millionth person to ask the same question. I also searched the web for a possibility and I'm getting mixed results. I'm sure many people are wondering about the same thing. I have originally JB and unlocked my 3GS using the 06.15.00 ipad baseband and 4.2.1 IOS. I have used the phone for a couple of years, everything working including GPS. It still works and there is nothing wrong with it. But since AT&T will unlock out of contract phones, I'm wondering if I could downgrade from the 06.15.00 to whatever, and then do a restore to factory settings and get them to unlock it for me. They unlocked my wife's phone which she never JB. This way I can get it back to "normal" and update the phone like a normal human being. Some sites suggest that I could downgrade to something else then do a restore, but others say that once you do ipad baseband, you can never EVER go back to normal factory setting. Thanks in advance for the help.